LDraw.org Discussion Forums

Here's some pics from inside 87574 train motor. It is sealed by 6× Torx T6 screws and requires the appropriate screwdriver to open.


First view inside. We can see that there's a two-headed DC motor, with power first transferred through a crown gear and then further stepped down.


Insides of the bottom part. The text reads "54756 04-J03".


Close-up on one of the gearboxes.


Close-up on the other one.


Orange axles removed. The top part reads 89832 02-J03


Close-up on orange axles.

The bottom part is not completely symmetrical. So if it does not fit snugly in when reassembling, don't force it, instead rotate it by 180° and try again.